Electric cut-out



(No Model.)

W. P. MASHINTER.

ELECTRIC GUT-OUT.

No. 498,560. Patented May 80, 1893.

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UNITED STATES PATENT QFFICE WVILLIAM P. MASHINTER, OF MONTREAL, CANADA, ASSIGNOR OF TVO-THIRDS TO MONTAGUE LINNELL AND CHARLES MORTON, OF SAME Application filed July 5, 1892.

T aZZ whom it may concern.-

Be it known that I, WILLIAM PRATTON MAsHINTER, of the city of Montreal, in the district of Montreal and Province of Quebec,

Canada, have invented certain new and usefulImprovement-s in Electric Out-Outs; and I do hereby declare that the following is a full, clear, and exact description of the same.

This invention relates to film cut outs for IO use in effecting the maintenance of a working circuit in the event of a breakage of the loose wires going to the lamp and has for its object to produce a device free from the objection that during the resetting of the same the spring contact must bear upon the film and also to allow of a film being used which Will last longer than the present forms. For full comprehension however of theinvention, reference mustbe had to the annexed drawings forming a part of this specification in which like symbols indicate corresponding parts and wherein- Figure 1 is a front elevation of the top portion of a pole showing the location of the cut out and wires in street lighting; Fig.2 a detail front elevation of cut out with cover removed and showing the parts in their normal position, and the base in section; Fig. 3 a

plan view of the same parts shown in Fig. 2.

A is the pole, B the top cross arm, P N the main Wires of the circuit and P N the loose hanger wires extending from the main wires to the lamp which latter is not shown. On the pole just below the cross arm B the cut out is located, its construction being as follows:

A base 0 formed of a reasonably thick disk of porcelain or like material carries two metal posts or standards D E letinto seats for their 0 bases in the top surface of the disk and held by screws d e passing through apertures in same, the heads of the screws being preferably countersunk and the spaces properly sealed. The disk or base 0 is also perforated centrally to accommodate a vertically movable circular rod F of fiber or like insulating material carrying near its upper end a collar or boss F of metal the function of which will be described further on.

ELECTRIC CUT-OUT.

SPECIFICATION forming part of Letters Patent No. 498,560, dated May 30, 1893.

Serial No. 438,955. (No model.)

The standard or post D has an inwardly projecting arm D slotted or formed with a side opening D at its end to receive freely and support a film carrier in the form of a boss G on the under side of adisk G on which the film H in the form of a disk of paper, is clamped by another disk G screwed down upon that of G.

The boss G is annularly grooved as at g to fit within said opening D in the arm D and the grooving has the edect of furnishing upper and lower overlapping edges g g which serve to hold the boss against vertical displacement from the arm. The boss G, the two disks G G and the film H are also perfor-ated centrally to allow of the free passage through them of the upper end of the rod F, the bottom surface of the boss being in addition ratchet toothed as at h so that abeveled pin or projection Jon the upper surface of the collar F when the rod F is raised, can be engaged with such teeth and the disk carrying the film rotated by turning such rod, any suitable handle, such as K, being provided on the lower end of the rod for the purpose.

The film carrier is further held in place in the arm D by means of a spring (1 secured at one end to the standard D and having its other and free end bent down beside the periphery of the boss G and inward under its bottom surface so as to engage with the teeth thereon and serve to hold the carrier against accidental movement. Extending from another arm D on the standard D to the standard E and above the film carrier is a contact maker in the form of a spring bar L screwed atZ to the arm D and havingaspherical projection Z on the under side of its other and free end adapted to bear upon the film and hold it firmly upon the top of the standard or post E.

Two contact springs M Mare secured to the inner sides of the posts D E and have their free ends projected to make connection with the metal collar F on the rod F for the purposes now to be described.

1), n, are two branch wires from the mains P N to the posts D E the base 0 being perforated for the insertion of their ends, and in the event of either of the hanger wires P N breaking, asnot infrequentlyhappens,the current instead of beinginterrupted would by reason of the excess of voltage thrown upon such branch wires 1) n, jump through the film and establish a connection through the postsD and E and the contact maker K so that the remainder of the circuit would not be interfered with. After the eruption or discharge through the film has taken place, the bearing points of the contacts are roughened and unless the pressure is removed from the film this latter will be torn when rotated to introduce a fresh portion of the film and to avoid this and relieve the film it is only necessary to push up the rod F to the position shown by dotted lines in Fig. 2 when the contact maker K will be first raised to free the film and the pin J engaged with one of the teeth h so that by turning the red the film carrier will be rotated and with it the film. Simultaneously with the elevation of the contact maker K a connection is established between the contacts L L and the collar F whereby the current is shunted without interruption by the raising of such contact maker.

That I claim is as follows:

1. In an electric cut out, branch or shunt wires from the mains; insulated contacts, one fixed and the other movable; a film carrier; a film mounted on said carrier and extend ing between said contacts; and means included in said out out for jointly operating said movable contact and rotating said carmet.

2. In an electric film cut out, insulated contacts; a circular film carrier; a film in the form of a flat disk of greater circumference than, and mounted on, said carrier and extending between said contacts.

3. In an electric film cut out, the combination with a film and its carrier,of a fixed and a movable contact, the latter exerting a pressure upon said film, and means included in said out out for jointly operating said movable contact to relieve the pressure upon the film and to rotate both carrier and film.

4. In an electric cut out, the combination with a fixed holder or standard,of a rotary film carrier carrying the film; and means, included in said out out, normally out of contact with said carrier, for jointly making connection with and rotating same as set forth.

5. The combination with the holder arm D having opening D ,0f the film carrier formed of disk G and grooved boss G, ratchet-toothed on its bottom surface; spring d; and means for rotating said carrier as set forth.

6. In an electric film cut out, insulated contacts, one fixed and the other movable; a centrally perforated film carrier; a film mounted on said carrier and extending between said contacts, and the movable contact exerting a pressure upon said film; anda key or spindle adapted to pass through said carrier and operate said movable contact to relieve the pressure upon the film and to rotate the carrier and film as set forth.

7. In an electric film cut out, a pair of illsulated contacts one fixed and the other movable; a rotatory film carrier; a fiat film mounted on said carrier and extending between said contacts; and the movable contact exerting a pressure upon said film; and means included in said cut out for jointly operating said movable contact to relieve the pressure upon the film and rotating said carrier and film as set forth.

8. In an electric film cut out, a pair of insulated contacts one fixed and the other movable; a film carrier; a film mounted on said carrier and extending between said contacts; auxiliary contacts; and means for operating said movable contact, rotating said carrier, and effecting a union between said auxiliary contacts for the purposes set forth.

9. In an electric cut out: two branch or shunt wires from the mains; an insulated base plate; two binding posts carried thereby for the attachment of said shunt Wires; a spring contact maker extending between and bearing upon one of said posts; a rotary film carrier; a film in the form of a flat disk mounted on such carrier and extending between said contact maker and one of said posts; with means for moving said contact maker and retating said carrier, as set forth.

10. In an electric film cut out, branch or shunt wires from the mains; an insulated base plate; a pair of combined binding posts and insulated contacts of these latter one being fixed and the other movable; a centrally perforated rotatory film carrier situated centrally of said contacts and having its under surface ratchet-toothed; a film mounted on said carrier and extending between said contacts; a pair of auxiliary contacts projecting from said binding posts; and a central movable insulated key or spindle passing through said insulated base and provided with a metallic collar having a pin or projection on its upper side, the upper part of said spindle being adapted to pass through said film carrier, and operate the movable contact, simultaneously therewith effecting a union between said auxiliary contacts through said metal collar and causing the pin thereon to engage the ratchet toothed underside of said carrier, whereby it can be rotated as set forth.

11. The combination with the holder arm D having opening D of the film carrier formed of disk G and grooved boss G ratchet-t0othed on its bottom surface; spring (Z; and a movable insulated key or spindle adapted to make contact with said boss G and rotate said carrier as set forth.

Montreal, 27th day of June, 1892.

WILLIAM P. DIASHINTER.

Witnesses:

WILL P. McFEAT, FRED. J. SEARS. 

